The 2023-24 Skybox Metal Universe Meltdown Matthew Knies #M8 (RC) trading card is a standard-sized rookie insert card featuring Matthew Knies of the Toronto Maple Leafs in the National Hockey League (NHL). Manufactured by Upper Deck and part of the 2023-24 Skybox Metal Universe set, this English-language card is an original print with no autograph. It falls under the Meltdown insert set, making it a sought-after collectible for ice hockey fans and trading card enthusiasts alike.